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【单选题】
It has been proved ___ eating vegetables in childhood helps to protect you against serious illnesses in later life.A.
if
B.
because
C.
when
D.
that
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【简答题】完形填空。 In an English class Teacher: Let's play a with 3-letter words. First, a 3-letter word is spoken. Then the next person has to say a different 3-letter word that starts with the last word in...
【简答题】说明相关系数的性质
【多选题】以下关于相关系数的性质说法正确的是( )
A.
r=0，说明两个变量之间不相关
B.
r可以大于0也可以小于0
C.
r虽然是两个变量之间线性关系的一个度量，并不能说明其具有因果关系
D.
x与y的相关系数与y与x的相关系数是不同的
【简答题】读图回答问题。 （1）甲山的海拔是 米。 （2）甲山与乙山相对高度是 米。 （3）乙山的海拔是 米。
【单选题】-- What do you want to do next? We have half an hour until the basketball game starts. -- It ’ s up to you. _____ you want to do is fine with me.
A.
Whatever
B.
However
C.
Whichever
D.
Whoever
【简答题】agers at one German school are learning how to achieve happiness alongside other traditional subjects such as math and languages. The class sit in a circle with their eyes shut and they count from...
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